Clamp



(No Model.) I

G. W. BAKER.

CLAMP. 110.417,307. Patend Deo, 17,1889

UNITED STATES PATENT OEEICE.

GARDNER IV. BAKER, OF PAINESVILLE, OI-IIO.

CVLANI P.

SPECIFICATION forming part of Letters Patent No. 417,307, dated December 1*?, 1889, Application filed April 26, 1889. Serial No. 308,678` (No model.)

To @ZZ whom t may concern/s Be it known that l, GARDNER W. BAKER, of Painesville, in the county of Lake and StateT5 of Ohio, have invented certain new and useful Improvements in Olamps; and I do hereby declare'the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in clamps; and it consists in certain features of construction and in combination of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure l is a side elevation. lig. 2 is an elevation in longitudinal section.. Figs. 3 and et .are end elevations showing the inner faces of the two members of the clamp.

I-lerctofore light portable clamps have usually been constructed with sockets to Iit a bar of wood or metal, and consequently such tie-bar was usually carried about with the clamps in the tool-chest, and frequently such tie-bar was not long enough for the work in hand. I have therefore devised clamps adapted to be placed on, for instance, the edge of a board or any strip of wood at hand to serve as a tie-bar, and consequently such tie-bar has not to be carried about. The two members of the clamp A and B are similar in construction, eXcept the former has a ilat faceplate a for engaging the work, and member B has a thumb-screw Z9 for the same purpose, such thumb -screw being provided with a broad-faced cap h. Face-plate a is set at right angles to the member a', the latter having a flat surface for engaging the edge of the wooden board or strip C, that serves as a tiebar. The rear end of member a is provided with a depending V-shaped rib o?. Vhen a pressure is applied to face-plate a in clamping the work, rib a2 is pressed down and made to indent the wooden strip O to prevent the clamp from slipping. Members a a are braced by a broad thin web a3. A A2 are opposing jaws depending from the body of the clamp and adapted to extend down astride the tiebar (l. Jaw A has a lateral screw-threaded hole for receiving thumb-screw D for tightening the member of the clamp upon the tiebar. These two jaws are re-enforced by a broad thin curved flange A3, the form thereof being shown more clearly in Figs. 3 and 4f. J aw A2 has a circular V-shaped rib A4 projecting from the inner face thereof, this rib being located opposite screw D. In tightening screw D rib A4 is pressed into the wood and helps to hold the clamp from slipping. Member B, except its being provided with screwthreaded hole for receiving screw b aforesaid, is constructed substantially the same as member A, and therefore need not be described in detail. Such clamps for light work may be of such comparatively small size that the workman can carry them in his pocket, and yet these clamps can be made to stand work of any size, the only limit in this respect being the length of the tie bar or board O, to which, for the time being, the clamp may be secured. By reason of the thin broad web and flange, respectively, a3 and A3, the necessary strength is secured with but little weight of metal, and clamps of such construction and for light work need not weigh but a few ounces. The two members of the clamp are usually constructed right and left handed, as shown, so as to bring the securing thumb-screws D o n the same side of the clamp, although this is not a matter of importance.

l. Clamps, the one member thereof having a iat bearing, a rigid face-plate integral therewith and projecting from one side at right angles thereto, the other member having .a fiat bearing, a rigid face-plate, a thumb-screw mounted in the rigid plate for engaging the work, each member having jaws projecting from the flat bearing on the side opposite the face-plates, and thumb-screws for locking the clamps to a tie-bar, substantially as set forth.

2. Clamps, the one member thereof having a fiat bearing, a rigid face-plate integral there with and projecting from one side at right angles thereto, the other member having a flat bearing, a rigid face-plate, and a thumb-screw mounted in the rigid face-plate for engaging the work, each member having jaws projecting from the iiat bearing on the sido opposite In testimony whereof I sign this specificathe face-plate, thumb-screws for looking the tion, in the presence of two witnesses, this Io clamps to a tie-ban', and the ribs UP A4, sub- 18th day of March, 1889. stantially as set forth. T 1

3. Clamps consisting, essentially, of ineln- GAIDB ER W' LAKER bers ce ct', constructed at right angles to each Witnesses: other, rib ft2, jaws A A2, and iiange A3, the CHAS. H. DORER, partsbeingintegral, substantially as set forth. ALBERT E. LYNCH. 

